Scientists believe that mastodons, elephant-like mammals that flourished worldwide from Miocene through Pleistocene times, first appeared nearly 4 million years ago. Though the large, furry, prehistoric mammals resembled wooly mammoths, the two had distinctly different dental and skeletal structures. Hunting may have played a role in the extinction of the mastodon 10,000 years ago. In what US states have mastodon remains been found? Discuss